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I have the latest, version 3.1.2 and have multisite installed. I have debug on true for testing purposes. I get the follow error when I install plugins.

Where and how do I fix this?

Error: Notice: has_cap was called with an argument that is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead. in /home/mysite/public_html/wp-includes/functions.php on line 3387

thanks in advance!

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A Plugin is using a deprecated function and/or function argument. You should file a bug report with the Plugin developer. WPSE shouldn't be used for reporting bugs. –  Chip Bennett Aug 5 '11 at 14:43

1 Answer 1

You are fine , its the plugins who are bad! some plugins have not been updated and are still using User level as capability when adding menu pages instead of capability, for example

 10 = manage_options = admin

take a look at this thread to understand better.

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Thanks for the answer;) See this thread for reference: wordpress.org/support/topic/… –  user5188 May 7 '11 at 4:09

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